查询词典 archegonia

Moreover, the extremely slow development of gametophyte and time interval between the appearance of antheridia and archegonia resulting from the inherent physiochemical property of red soil make it impossible to fertilize and generate sporophyte.

此外，红壤固有的理化性质导致扇蕨配子体发育极其缓慢、精子器和颈卵器发生的时间间隔过长使其不能受精产生于包子体。

Of mosses having the archegonia on short lateral branches.

在短侧枝上有颈卵器。

Many forest tree species have multiple archegonia which, after fertilization produce a number of proembryos

许多林木树种都有颈卵器，受精以后便产生许多原胚。

Many forest tree species have multiple archegonia which, after fertilization produce a number of proembryos

许多林木树种都有颈卵器，受精以后便产生许多原胚。在传粉与受精的间隔期间，他们毁坏了雌球花。

The initiati on and development of archegonia in Gingko,compared with those of cycads, w ere liked to be more primitive at the evolutional level.

银杏雌配子体及颈卵器的发生与发育，和苏铁类植物比较，在演化程度上可能更为原始。

In the Coniferophyta the female gametophyte is reduced to a nonphotosynthetic tissue with up to 2000 nuclei in the ovule, which produces archegonia.

松柏类植物的雌配子体成为颈卵器，其胚珠为含有2000个以上的核的非光合组织，（参见 archegonium ）。

Of mosses having the archegonia at the top of the stem.

主干顶端有颈卵器。

The fertilization was processed by sperm in mature male gametophyte combining with egg cell on the top of archegonia on June 15 or so.

摘要樟子松发育成熟的雄配子体中的精子6月15日左右在颈卵器中上部与卵细胞结合，进行受精作用，其后，受精卵进行游离核分裂，形成8个子核时，开始形成细胞壁。

The female gametophyte is represented by the embryosac, the archegonia being absent.

雌性配子体存在于胚囊中，颈卵器缺失。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷